Freedom Enterprise MisMatcher01 Rev.D, Руководство пользователя

Страница: 11 / 19

11
Test condition: power on, all
DIP switch positions off, gain at full
CCW position, all 75
W jumpers on,
no inputs connected.
All measures in V
Q1:
C:4.220 B:2.786 E:2.136
Q2:
C:3.374 B:4.220 E:4.880
Q4:
C:1.576 B:4.570 E:5.000
Q5:
C:5.090 B:5.060 E:4.390
Q6:
C:4.580 B:1.579 E:1.037
If your measured values are
more than 10% off, ensure you
have installed the correct resistor
values in each section.
The LED doesn’t turn on.
1. Using a multi-meter, check
for 5V on the oscilloscope probing
points. If 5V are present, confirm
the LED is in the correct orientation.
2. If 5V are not present, use
a different Micro USB cable and
charger and check the polarity of
the diode in the PSU section.
No video output from one of
the stages.
1. Ensure the capacitors and
transistors are in the right orientation.
2. Check the voltages in
these locations.
VIII. TROUBLESHOOTING